carbon-neutral
adjective uk/ˌkɑː.bənˈnjuː.trəl/ us/ˌkɑːr.bənˈnuː.trəl/
碳平衡的（个人、组织等以种树等行为抵消自身活动造成的二氧化碳气体排放，达到“碳平衡”）
If a person, organization, event, etc. is carbon-neutral, it does things such as planting trees to reduce carbon dioxide by the same amount as it produces it.